n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 15 |
3 | 93 |
4 | 627 |
5 | 4368 |
6 | 30957 |
7 | 222015 |
8 | 1606803 |
9 | 11713260 |
10 | 85884660 |
11 | 632726988 |
12 | 4679850525 |
13 | 34729198260 |
14 | 258460942671 |
15 | 1928258130018 |
16 | 14416834880067 |
17 | 107993546227875 |
18 | 810319315565760 |
19 | 6089298408130707 |
20 | 45821042464807512 |
21 | 345217506895648767 |
[1,3,15,93,627,4368,30957,222015,1606803,11713260, 85884660,632726988,4679850525,34729198260, 258460942671,1928258130018,14416834880067, 107993546227875,810319315565760,6089298408130707, 45821042464807512,345217506895648767] |